CHARGING SYSTEM AND FRECUENCY TUNING METHOD FOR AN IMPLANTABLE DEVICE

Title:

CHARGING SYSTEM AND FRECUENCY TUNING METHOD FOR AN IMPLANTABLE DEVICE

Document Type and Number:

WIPO Patent Application WO/2012/145178

Kind Code:

A3

Abstract:

Techniques are disclosed for tuning a frequency at which an external device transcutaneously transfers energy. The transferred energy may be used to charge a rechargeable power source of an implantable medical device (IMD) and/or to power the IMD directly. One technique relates to a charging system that may comprise a circuit to drive a primary coil of an external device at a drive frequency and a control circuit to tune the drive frequency based on a characteristic of a moni- tored signal that is associated with the primary coil. The characteristic is not present when the primary coil is being driven at a resonant fre- quency of the system. In a specific example, the characteristic com- prises a stub pulse and the control circuit is configured to tune ((200) -(216)) the drive frequency based on at least one of a relative timing and a width of the stub pulse.

Inventors:

OLSON DAVID P (US)
DELISI NICHOLAS A (US)
EISCH JAY T (US)
LABROSSE PHILIP R (US)
NOLAN JOSEPH J (US)

Application Number:

PCT/US2012/032468

Publication Date:

April 11, 2013

Filing Date:

April 06, 2012

Export Citation:

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Assignee:

MEDTRONIC INC (US)
OLSON DAVID P (US)
DELISI NICHOLAS A (US)
EISCH JAY T (US)
LABROSSE PHILIP R (US)
NOLAN JOSEPH J (US)

International Classes:

A61N1/378

Foreign References:

US20050119716A1	2005-06-02
US20100106223A1	2010-04-29
US5995874A	1999-11-30
US5713939A	1998-02-03

Other References: